Question

Convert the below C code to basic MIPS. Please leave comments for explanation #include <stdio.h> int main(void) {...

Convert the below C code to basic MIPS. Please leave comments for explanation

#include <stdio.h>


int main(void)
{
printf("Insert two numbers\n");
int a,b;
scanf("%d",&a);
scanf("%d",&b);
a=a<<2;
b=b<<2;
printf("%d&%d\n",a,b);
return 0;
}

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Answer #1
Code in MIPS :
.file   1 ""
        .section .mdebug.abi32
        .previous
        .nan    legacy
        .module fp=32
        .module nooddspreg
        .abicalls
        .rdata
        .align  2
$LC0:
        .ascii  "Insert two numbers\000"
        .align  2
$LC1:
        .ascii  "%d\000"
        .align  2
$LC2:
        .ascii  "%d&%d\012\000"
        .text
        .align  2
        .globl  main
        .set    nomips16
        .set    nomicromips
        .ent    main
        .type   main, @function
main:
        .frame  $fp,40,$31              # vars= 8, regs= 2/0, args= 16, gp= 8
        .mask   0xc0000000,-4
        .fmask  0x00000000,0
        .set    noreorder
        .cpload $25
        .set    nomacro
        addiu   $sp,$sp,-40
        sw      $31,36($sp)
        sw      $fp,32($sp)
        move    $fp,$sp
        .cprestore      16
        movz    $31,$31,$0
        lw      $2,%got($LC0)($28)
        nop
        addiu   $4,$2,%lo($LC0)
        lw      $2,%call16(puts)($28)
        nop
        move    $25,$2
        .reloc  1f,R_MIPS_JALR,puts
1:      jalr    $25
        nop

        lw      $28,16($fp)
        addiu   $2,$fp,24
        move    $5,$2
        lw      $2,%got($LC1)($28)
        nop
        addiu   $4,$2,%lo($LC1)
        lw      $2,%call16(__isoc99_scanf)($28)
        nop
        move    $25,$2
        .reloc  1f,R_MIPS_JALR,__isoc99_scanf
1:      jalr    $25
        nop

        lw      $28,16($fp)
        addiu   $2,$fp,28
        move    $5,$2
        lw      $2,%got($LC1)($28)
        nop
        addiu   $4,$2,%lo($LC1)
        lw      $2,%call16(__isoc99_scanf)($28)
        nop
        move    $25,$2
        .reloc  1f,R_MIPS_JALR,__isoc99_scanf
1:      jalr    $25
        nop

        lw      $28,16($fp)
        lw      $2,24($fp)
        nop
        sll     $2,$2,2
        sw      $2,24($fp)
        lw      $2,28($fp)
        nop
        sll     $2,$2,2
        sw      $2,28($fp)
        lw      $2,24($fp)
        lw      $3,28($fp)
        nop
        move    $6,$3
        move    $5,$2
        lw      $2,%got($LC2)($28)
        nop
        addiu   $4,$2,%lo($LC2)
        lw      $2,%call16(printf)($28)
        nop
        move    $25,$2
        .reloc  1f,R_MIPS_JALR,printf
1:      jalr    $25
        nop

        lw      $28,16($fp)
        move    $2,$0
        move    $sp,$fp
        lw      $31,36($sp)
        lw      $fp,32($sp)
        addiu   $sp,$sp,40
        j       $31
        nop

        .set    macro
        .set    reorder
        .end    main
        .size   main, .-main
        .ident  "GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609"

images:

.file .section .mdebug.abi32 previous ии 1 legacy module fp-32 module nooddspreg .abicalls .nan .rdata align 2 $LCO: .ascii16 .cprestore $31,$31,$0 $2,%got($LC@) ($28) movz lw nop addiu $4,$2,%lo($LCe) $2,%call16(puts)($28) lw nop $25,$2 .reloc 1f,$28,16($fp) $2,24($fp) 1w lw nop sll $2,$2,2 $2,24($fp) $2,28($fp) SW lw nop sll $2,$2,2 $2,28($fp) $2,24($fp) $3,28($fp) SW

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